package com.tanhua.dubbo.api;




import cn.hutool.core.collection.CollUtil;
import com.tanhua.dubbo.utils.IdWorker;
import com.tanhua.dubbo.utils.TimeLineService;
import com.tanhua.model.vo.PageResult;
import com.tanhua.model.mongo.Movement;
import com.tanhua.model.mongo.MovementTimeLine;
import org.apache.dubbo.config.annotation.DubboService;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.aggregation.Aggregation;
import org.springframework.data.mongodb.core.aggregation.AggregationResults;
import org.springframework.data.mongodb.core.aggregation.TypedAggregation;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;

import java.util.List;

@DubboService
public class MovementApiImpl implements MovementApi{
    @Autowired
    private IdWorker idWorker;
    @Autowired
    private MongoTemplate mongoTemplate;
    @Autowired
    private TimeLineService timeLineService;


    @Override
    public void publish(Movement movement) {

        //1、保存动态详情
        try {
            //设置PID
            movement.setPid(idWorker.getNextId("movement"));
            //设置时间
            movement.setCreated(System.currentTimeMillis());
            //保存数据
            mongoTemplate.save(movement);
            timeLineService.saveTimeLine(movement.getUserId(), movement.getId());
//            //2、查询当前用户的好友数据
//            Criteria criteria = Criteria.where("userId").is(movement.getUserId());
//            Query query = Query.query(criteria);
//            List<Friend> friends = mongoTemplate.find(query, Friend.class);
//            //3、循环好友数据，构建时间线数据存入数据库
//            for (Friend friend : friends) {
//                MovementTimeLine timeLine = new MovementTimeLine();
//                timeLine.setUserId(friend.getUserId());
//                timeLine.setCreated(System.currentTimeMillis());
//                timeLine.setFriendId(friend.getFriendId());
//                timeLine.setMovementId(movement.getId());
//                mongoTemplate.save(timeLine);
//            }
        } catch (Exception e) {
            //忽略事务处理
            e.printStackTrace();
        }

    }

    @Override
    public PageResult findByUserId(Long userId, Integer page, Integer pagesize) {
        //创建Criteria
        Criteria criteria = Criteria.where("userId").is(userId);
        //创建Query对象
        Query query = Query.query(criteria);
        //查询总记录数
        long count = mongoTemplate.count(query, Movement.class);
        //设置分页查询参数
        query.skip((page-1)*pagesize).limit(pagesize).with(Sort.by(Sort.Order.desc("created")));
        //查询分页数据列表
        List<Movement> movements = mongoTemplate.find(query, Movement.class);
        //构造返回值
        PageResult pageResult = new PageResult(page,pagesize, Math.toIntExact(count),movements);
        return pageResult;
    }
    //查询好友动态列表
    @Override
    public List<Movement> findFriendMovements(Integer page, Integer pagesize, Long userId) {
        //1.构建criteria,根据friendId查询时间线表
        Criteria criteria = Criteria.where("friendId").is(userId);
        //2.创建Query对象
        Query query = Query.query(criteria);
        //3.设置分页查询参数
        query.skip((page-1)*pagesize).limit(pagesize).with(Sort.by(Sort.Order.asc("created")));
        //4.查询分页数据列表
        List<MovementTimeLine> movementTimeLine = mongoTemplate.find(query, MovementTimeLine.class);
        //查询出动态ID列表
        List<ObjectId> movementId = CollUtil.getFieldValues(movementTimeLine, "movementId", ObjectId.class);
        Query movementQuery = Query.query(Criteria.where("id").in(movementId));
        //根据动态id查询出动态列表
        List<Movement> movements1 = mongoTemplate.find(movementQuery, Movement.class);
        return movements1;
    }


        //随机查询多条数据
    @Override
    public List<Movement> randomMovements(Integer counts) {
        //1、创建统计对象，设置统计参数
        TypedAggregation<Movement> movementTypedAggregation = Aggregation.newAggregation(Movement.class, Aggregation.sample(counts));
        //2、调用mongoTemplate方法统计
        AggregationResults<Movement> aggregate = mongoTemplate.aggregate(movementTypedAggregation, Movement.class);
        //3、获取统计结果
        List<Movement> mappedResults = aggregate.getMappedResults();
        return mappedResults;
    }
    //根据pid查询推荐动态
    @Override
    public List<Movement> findMovementsByPids(List<Long> pids) {
        Query query =  Query.query(Criteria.where("pid").in(pids));
        List<Movement> movements = mongoTemplate.find(query, Movement.class);
        return movements;
    }

    //查询单条动态
    @Override
    public Movement findById(String movementId) {
        return mongoTemplate.findById(movementId,Movement.class);
    }


    //根据用户ID分页查询动态
    @Override
    public PageResult findByUserIds(Long uid, Integer state, Integer page, Integer pagesize) {
        Query query = new Query();
        if(uid != null) {
            query.addCriteria(Criteria.where("userId").is(uid));
        }
        if(state != null) {
            query.addCriteria(Criteria.where("state").is(state));
        }
        long count = mongoTemplate.count(query, Movement.class);
        query.skip((page-1)*pagesize).limit(pagesize).with(Sort.by(Sort.Order.desc("created")));
        List<Movement> movements = mongoTemplate.find(query, Movement.class);
        return new PageResult(page,pagesize, Math.toIntExact(count),movements);
    }


}
